the sensitivity, optimum frequency and directivity of an aerial
2. formal
the state or quality of being directed, as by a particular force
Examples of 'directivity' in a sentence
directivity
Increasing the temperature or the frequency, the ultrasonic propagation can obtain an excellent directivity.
Yunxin Wu, Lei Han, Hai Gong, A. S. Ahmad 2018, 'A modified model for simulating the effect of temperature on ultrasonic attenuationin 7050 aluminum alloy', AIP Advanceshttp://dx.doi.org/10.1063/1.5045627. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
This indicates the influence of the landslide body on seismic response directivity.
V. Del Gaudio, S. Coccia, J. Wasowski, M. R. Gallipoli, M. Mucciarelli 2008, 'Detection of directivity in seismic site response from microtremor spectral analysis',Natural Hazards and Earth System Scienceshttp://www.nat-hazards-earth-syst-sci.net/8/751/2008/nhess-8-751-2008.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Here, we demonstrate nanoantenna designs in terms of improved directivity.
Aftab Ahmed, Yuanjie Pang, Ghazal Hajisalem, Reuven Gordon 2012, 'Antenna Design for Directivity-Enhanced Raman Spectroscopy', International Journal of Opticshttp://dx.doi.org/10.1155/2012/729138. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The antenna has the advantages of flatness, ultra-thin thickness, high gain and good directivity.
Guang Lu, Wei Wang, Fabao Yan, Chao Diao, Xiachen Zhou, Zhao Wu, Fen Liu, Yong Sun,Guiqiang Du, Yao Chen 2019, 'Large area subwavelength cavity antenna with planar metamaterials', AIP Advanceshttp://dx.doi.org/10.1063/1.5089666. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Its monochromaticity and directivity are also much better.
Weihao Liu, Weiwei Li, Zhigang He, Qika Jia 2015, 'Theory of the special Smith-Purcell radiation from a rectangular grating', AIP Advanceshttp://dx.doi.org/10.1063/1.4939538. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
These can be combined to create and manipulate directivity characteristics of the synthesized virtual sources.
Corteel E 2007, 'Synthesis of Directional Sources Using Wave Field Synthesis, Possibilities, and Limitations',EURASIP Journal on Advances in Signal Processinghttp://asp.eurasipjournals.com/content/2007/090509. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The amplification of forward rupture directivity was three times greater than the backward rupture directivity.
Chun-Te Chen, Shun-Chiang Chang, Kuo-Liang Wen 2017, 'Stochastic ground motion simulation of the 2016 Meinong, Taiwan earthquake', Earth, Planets and Spacehttp://link.springer.com/article/10.1186/s40623-017-0645-z. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
With the increase of the analyzed frequency, both directivity and periodicity wereshown more obviously.
Ya-hui Wang, Jian-ting Wang, Liu-qiang Fu 2017, 'Full-spectrum noise prediction of the high-speed train head under multi-physics couplingexcitations based on statistical energy analysis', Journal of Vibroengineeringhttps://www.jvejournals.com/article/16878. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The proposed antenna achieves a good performance in terms of port-to-port isolation, directivity, and cross-polarization.
Ayman S. Al-Zayed, Mohammed A. Kourah, Samir F. Mahmoud 2017, 'Tunable H-Shaped Microstrip Antenna with Dual Feeding', International Journal of Antennas and Propagationhttp://dx.doi.org/10.1155/2017/9395716. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)